Hello there, just signed up to this site and forum.
Would appreciate any advice or ideas on what to try next, as I'm out of ideas right now.
Issue is my radiators are hot upstairs (piping hot) and all but one downstairs are cold. The hot one is the downstairs toilet which is directly below the airing cupboard where the hot water tank is and the 3 way valve.
It's a system, with an open tank in loft, sealed tank in the airing cupboard, boiler in kitchen with the pump directly above the boiler. Boiler and airing cupboard opposite sides of the house on different floors.
The downstairs rad pipes drop down from ceiling height in the walls. Micro bore / 8mm pipe to the rads.
Towards the end of last winter, I noticed the downstairs rads weren't heating so well. But were warm. Upstairs was fine.
I've recently replaced all the radiators, except two that were almost new and I flushed those out.
I noticed the 3 way Honeywell valve did not appear to be working or doing anything and zero resistance on the lever. I've today changed the head of the 3 way valve. It now looks to be working correctly.
Few obeservations;
- When the head was off the 3 way ball valve itself, the valve moved freely with my fingers, not stiff.
- The old head, miraculously got its spring resistance back once removed, which the new head had out the box.
- The pipes for the heating in/out the 3 way valve, are piping hot.
- The pipes either side of the pump are piping hot, suggesting hot water is flowing through, but not sure at what pressure.
- Boiler pressure goes from about 1.2-1.5 bar idle to about 3 bar when on.
- Upstairs rads get hot with the heating on.
- Downstairs, only the toliet rad is hot as before, though at least one pipe each side of each radiator is getting hot, but not as hot as the working rads upstairs. This itself is a change and advance on the original problem, as the pipes were remaining cold pre changing the 3way valve head.
- The downstairs rads are still not heating up as a result.
The pump is definitely vibrating when on, with piping hot water both sides, in and out. Hot water is working fine. Boiler is working fine. I've went to bleed all the rads, there was no air in any, so that wasnt a problem.
The lockshield valves are all open, either side of each rad.
I'm a bit stuck and confused on this now. Unless it is the pump and its just vibrating and not pumping. I don't get why the upstairs rads work perfectly fine and downstairs (all but one) don't.
When I changed the rads, was a bit of muck in them, but all the valves and water flowing through the pipes was clear.
When I filled the new rads by opening the valves, they filled quickly, water pressure was good. So I dont think there is a blockage.
Any ideas or other suggestions would be appreciated.
Cheers...
Would appreciate any advice or ideas on what to try next, as I'm out of ideas right now.
Issue is my radiators are hot upstairs (piping hot) and all but one downstairs are cold. The hot one is the downstairs toilet which is directly below the airing cupboard where the hot water tank is and the 3 way valve.
It's a system, with an open tank in loft, sealed tank in the airing cupboard, boiler in kitchen with the pump directly above the boiler. Boiler and airing cupboard opposite sides of the house on different floors.
The downstairs rad pipes drop down from ceiling height in the walls. Micro bore / 8mm pipe to the rads.
Towards the end of last winter, I noticed the downstairs rads weren't heating so well. But were warm. Upstairs was fine.
I've recently replaced all the radiators, except two that were almost new and I flushed those out.
I noticed the 3 way Honeywell valve did not appear to be working or doing anything and zero resistance on the lever. I've today changed the head of the 3 way valve. It now looks to be working correctly.
Few obeservations;
- When the head was off the 3 way ball valve itself, the valve moved freely with my fingers, not stiff.
- The old head, miraculously got its spring resistance back once removed, which the new head had out the box.
- The pipes for the heating in/out the 3 way valve, are piping hot.
- The pipes either side of the pump are piping hot, suggesting hot water is flowing through, but not sure at what pressure.
- Boiler pressure goes from about 1.2-1.5 bar idle to about 3 bar when on.
- Upstairs rads get hot with the heating on.
- Downstairs, only the toliet rad is hot as before, though at least one pipe each side of each radiator is getting hot, but not as hot as the working rads upstairs. This itself is a change and advance on the original problem, as the pipes were remaining cold pre changing the 3way valve head.
- The downstairs rads are still not heating up as a result.
The pump is definitely vibrating when on, with piping hot water both sides, in and out. Hot water is working fine. Boiler is working fine. I've went to bleed all the rads, there was no air in any, so that wasnt a problem.
The lockshield valves are all open, either side of each rad.
I'm a bit stuck and confused on this now. Unless it is the pump and its just vibrating and not pumping. I don't get why the upstairs rads work perfectly fine and downstairs (all but one) don't.
When I changed the rads, was a bit of muck in them, but all the valves and water flowing through the pipes was clear.
When I filled the new rads by opening the valves, they filled quickly, water pressure was good. So I dont think there is a blockage.
Any ideas or other suggestions would be appreciated.
Cheers...
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